◎ 题干
—Was his father very strict with him when he was at school?
—Yes, he had never praised him _______ he became one of the top students in his grade.
A.after B.unless
C.until D.when
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“—Was his father very strict with him when he was at school?—Yes, he had never praised him _______ he became one of the top students in his grade. A.after B.unle…”主要考查了你对  【状语从句】【限制性定语从句】【主语从句】【同位语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。